/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:21:25,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:21:25,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:21:25,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:21:25,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:21:25,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:21:25,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:21:25,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:21:25,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:21:25,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:21:25,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:21:25,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:21:25,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:21:25,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:21:25,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:21:25,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:21:25,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:21:25,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:21:25,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:21:25,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:21:25,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:21:25,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:21:25,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:21:25,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:21:25,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:21:25,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:21:25,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:21:25,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:21:25,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:21:25,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:21:25,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:21:25,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:21:25,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:21:25,954 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:21:25,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:21:25,954 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:21:25,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:21:25,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:21:25,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:21:25,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:21:25,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:21:25,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:21:25,957 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:21:25,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:21:25,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:21:25,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:21:25,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:21:25,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:21:25,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:21:25,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:21:25,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:25,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:21:25,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:21:25,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:21:25,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:21:25,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:21:25,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:21:25,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:21:25,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:21:26,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:21:26,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:21:26,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:21:26,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:21:26,504 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:21:26,505 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-2.c [2020-09-21 10:21:26,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/086fad68d/46891e7ae53d4ce1ba57b4284d38f678/FLAG6608a1737 [2020-09-21 10:21:27,145 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:21:27,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-2.c [2020-09-21 10:21:27,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/086fad68d/46891e7ae53d4ce1ba57b4284d38f678/FLAG6608a1737 [2020-09-21 10:21:27,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/086fad68d/46891e7ae53d4ce1ba57b4284d38f678 [2020-09-21 10:21:27,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:21:27,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:21:27,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:27,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:21:27,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:21:27,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5c20e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27, skipping insertion in model container [2020-09-21 10:21:27,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:21:27,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:21:27,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:27,800 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:21:27,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:21:27,834 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:21:27,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27 WrapperNode [2020-09-21 10:21:27,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:21:27,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:21:27,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:21:27,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:21:27,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... [2020-09-21 10:21:27,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:21:27,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:21:27,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:21:27,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:21:27,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:21:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:21:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:21:28,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:21:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:21:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:21:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:21:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:21:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:21:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:21:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:21:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:21:28,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:21:28,281 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:21:28,281 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:21:28,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:28 BoogieIcfgContainer [2020-09-21 10:21:28,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:21:28,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:21:28,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:21:28,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:21:28,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:21:27" (1/3) ... [2020-09-21 10:21:28,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6691ee40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:28, skipping insertion in model container [2020-09-21 10:21:28,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:21:27" (2/3) ... [2020-09-21 10:21:28,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6691ee40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:21:28, skipping insertion in model container [2020-09-21 10:21:28,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:21:28" (3/3) ... [2020-09-21 10:21:28,296 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-2.c [2020-09-21 10:21:28,309 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:21:28,319 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:21:28,354 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:21:28,428 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:21:28,428 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:21:28,428 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:21:28,428 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:21:28,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:21:28,429 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:21:28,429 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:21:28,429 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:21:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-21 10:21:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:28,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:28,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:28,466 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-09-21 10:21:28,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:28,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492325130] [2020-09-21 10:21:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:28,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492325130] [2020-09-21 10:21:28,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:28,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:21:28,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751177725] [2020-09-21 10:21:28,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:21:28,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:21:28,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:28,794 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-09-21 10:21:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:28,908 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-09-21 10:21:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:21:28,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:21:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:28,924 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:21:28,925 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:21:28,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:21:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:21:28,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-09-21 10:21:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 10:21:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-09-21 10:21:28,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-09-21 10:21:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:28,979 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-09-21 10:21:28,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:21:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-09-21 10:21:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:28,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:28,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:28,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:21:28,981 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-09-21 10:21:28,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:28,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092225811] [2020-09-21 10:21:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:29,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092225811] [2020-09-21 10:21:29,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:29,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:21:29,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416715675] [2020-09-21 10:21:29,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:21:29,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:21:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:29,107 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-09-21 10:21:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:29,227 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-09-21 10:21:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:21:29,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-21 10:21:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:29,228 INFO L225 Difference]: With dead ends: 23 [2020-09-21 10:21:29,229 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 10:21:29,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:21:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 10:21:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 10:21:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 10:21:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-09-21 10:21:29,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-09-21 10:21:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:29,236 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-09-21 10:21:29,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:21:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-09-21 10:21:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:21:29,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:21:29,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:21:29,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:21:29,238 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:21:29,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:21:29,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-09-21 10:21:29,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:21:29,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543064632] [2020-09-21 10:21:29,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:21:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:21:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:21:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:21:29,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543064632] [2020-09-21 10:21:29,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:21:29,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:21:29,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483770471] [2020-09-21 10:21:29,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:21:29,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:21:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:21:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:21:29,381 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 7 states. [2020-09-21 10:21:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:21:29,468 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-09-21 10:21:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:21:29,469 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-21 10:21:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:21:29,469 INFO L225 Difference]: With dead ends: 14 [2020-09-21 10:21:29,470 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:21:29,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:21:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:21:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:21:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:21:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:21:29,472 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-09-21 10:21:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:21:29,472 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:21:29,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:21:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:21:29,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:21:29,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:21:29,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:21:29,519 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,520 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 10:21:29,520 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,520 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,520 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:21:29,521 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:21:29,521 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:21:29,521 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 29) no Hoare annotation was computed. [2020-09-21 10:21:29,521 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-21 10:21:29,522 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2020-09-21 10:21:29,522 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-21 10:21:29,522 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-09-21 10:21:29,522 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 29) no Hoare annotation was computed. [2020-09-21 10:21:29,522 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-09-21 10:21:29,523 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 29) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 10:21:29,523 INFO L264 CegarLoopResult]: At program point L22(lines 12 29) the Hoare annotation is: false [2020-09-21 10:21:29,523 INFO L268 CegarLoopResult]: For program point L16(lines 16 20) no Hoare annotation was computed. [2020-09-21 10:21:29,523 INFO L268 CegarLoopResult]: For program point L16-2(lines 16 20) no Hoare annotation was computed. [2020-09-21 10:21:29,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:21:29 BoogieIcfgContainer [2020-09-21 10:21:29,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:21:29,542 INFO L168 Benchmark]: Toolchain (without parser) took 2015.91 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.7 MB in the beginning and 93.3 MB in the end (delta: 8.3 MB). Peak memory consumption was 71.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,543 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:21:29,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.03 ms. Allocated memory is still 140.0 MB. Free memory was 101.0 MB in the beginning and 91.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,545 INFO L168 Benchmark]: Boogie Preprocessor took 118.13 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 181.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,546 INFO L168 Benchmark]: RCFGBuilder took 332.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.7 MB in the beginning and 167.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,547 INFO L168 Benchmark]: TraceAbstraction took 1250.87 ms. Allocated memory is still 202.9 MB. Free memory was 166.6 MB in the beginning and 93.3 MB in the end (delta: 73.3 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:21:29,550 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.03 ms. Allocated memory is still 140.0 MB. Free memory was 101.0 MB in the beginning and 91.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.13 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 181.3 MB in the end (delta: -90.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 332.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.7 MB in the beginning and 167.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1250.87 ms. Allocated memory is still 202.9 MB. Free memory was 166.6 MB in the beginning and 93.3 MB in the end (delta: 73.3 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 26 SDslu, 70 SDs, 0 SdLazy, 116 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 16 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1356 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...